It's a very fun and interesting! And it's also gonna be an Anime soon!
Katarina remembered her past life after an incident (she bumped her head or somethin) she remembered that in her past life she played an otome game which has become her life now. So she must do everything to avoid being exiled/killed by the targets.
Otome Game no Hametsu Flag shika nai Akuyaku Reijou ni Tensei shite shimatta...